practice How many grams of H2O are produced by completely reacting 24 g of O2? 2 H2 + O2  2 H2O convert to moles  convert to the desired molecule  convert to grams O2 = 32.00 g/mol ; H2O = 18.016 g/mol 24 g O2 1 mol O2 2 mol H2O 18.016 g H2O 32 g O2 1 mol H2O = 27 g H2O

Another How many grams of H2 are needed to form 34 g of H2O? 2 H2 + O2  2 H2O convert to moles  convert to the desired molecule  convert to grams H2 = 2.016 g/mol ; H2O = 18.016 g/mol 34 g H2O 1 mol H2O 2 mol H2 2.016 g H2 18.016 g H2O 2 mol H2O 1 mol H2 = 3.8 g H2

Balance the equation 1st, then do the problem Na + Cl2  NaCl How many grams of chlorine are needed to react with 37 g of Na? 2 2 37 g Na 1 mol Na 1 mol Cl2 70.90 g Cl2 22.99 g Na 2 mol Na =57 g Cl2

More CH4 + O2  H2O + CO2 How many grams of CH4 are needed to make 120 g of H2O? 2 2 120 g H2O 1 mol H2O 1 mol CH4 16.042 g CH4 18.016 g H2O 2 mol H2O = 53 g CH4

Still Going How many grams of H2CO3 are produced by completely reacting 24 g of CO2? H2O + CO2  H2CO3 24 g CO2 1 mol CO2 1 mol H2CO3 62.026 g H2CO3 44.01 g CO2 = 34 g H2CO3

Finally How many grams of AlCl3 are produced form 34 g of CuCl2? Al + CuCl2  AlCl3 + Cu 2 3 2 3 34 g CuCl2 1 mol CuCl2 2 mol AlCl3 133.33 g AlCl3 134.45 g CuCl2 3 mol CuCl2 1 mol AlCl3 = 22 g AlCl3

Homework HNO3 + Sc → Sc(NO3)3 + H2 How many grams of scandium III nitrate will be produced from 28.2 g of nitric acid?